declare module "ext:core/ops" {
  export function op_webstorage_clear(persistent: boolean): null;
  export function op_webstorage_get(args: [persistent: boolean, key: string]): string | null;
  export function op_webstorage_key(args: [persistent: boolean, index: number]): string | null;
  export function op_webstorage_keys(persistent: boolean): string[];
  export function op_webstorage_length(persistent: boolean): number;
  export function op_webstorage_remove(args: [persistent: boolean, key: string]): null;
  export function op_webstorage_set(args: [persistent: boolean, key: string, value: string]): boolean;
}